With the Avanca i11 True Wireless Bluetooth Earbuds, you can now enjoy great sound by simply connecting the headphones to your iOS or Android device with Bluetooth. With the built-in microphone of the i11 Headphones, you can easily answer calls when it rings without having to take the headphones off. The headphones have a range of 10m, ideal for walking around the house. Its 300mAh battery can last up to three hours of playtime and up to seven hours on standby and can be recharged in just 70 minutes. Plus, the included charging case lets you listen for longer on the go.